I've been sticking with a projectile (fleet quantum, in my case) as the fifth weapon just because I'm a little concerned about power drain. When all my cannons (and turrets) get going, I'm dropping down to almost 80 power.

Wait... ship warp core breaches are canceled out by high yield Omega torpedoes??

This is a thing that happens???

If you hit them with the Omega torp a few seconds before the ship dies it gets vaporized.
I don't see it always canceling the warp core breach though. Sometimes I see the vaporization effect on cubes but they still give off a warp core breach.

If you hit them with the Omega torp a few seconds before the ship dies it gets vaporized.
I don't see it always canceling the warp core breach though. Sometimes I see the vaporization effect on cubes but they still give off a warp core breach.

The cube explosion animation still happens, but the usual explosion proximity damage disappears. The Omega disintegration effect always happens so long as its plasma dot is still active when the target hits zero hull.